A. C. Pereira, H. Eggertsson, A. Moustafa, D. T. Zero, G. J. Eckert, and F. L. Mialhe, “Evaluation of three radiographic methods for detecting occlusal caries lesions”, Braz. J. Oral Sci., vol. 8, no. 2, pp. 67–70, Dec. 2015.